The Wimmera – Mallee water supply system is one of the largest earthen channel systems in the world and supplies water to 35,000 people. The Wimmera Mallee Pipeline Project replaced the existing earthen channel and storage system with approximately 9,000km of underground pipelines and synthetically lined storages. GMW awarded Nacap an EPC contract for Stage 2, Supply System 5 Murray-Culgoa, and involving 840km of pipeline construction.

During tender negotiation, Nacap offered both a conforming PVC option and also an innovative PE, vibratory plough alternative. This was a ground breaking innovation and significant challenges were overcome to accommodate laser controlled lay to grade, depth of cover, pipe jointing and logistics, padding and compaction issues whilst maintaining integrity for the installed pipelines.

During field trials, an independent third party analyst verified Nacap’s pipe laying technique. It was clearly evident that this new technology would ensure efficiency, safety, environmental benefits, quality and ensure the project’s timely delivery. The other obvious benefit was as a reduced capital cost for this stage and future stages of the project. In the space of just 4 weeks Nacap also finalised advanced management, safety, environmental and stakeholder management plans, detailed design, pipe manufacture and pipe logistics.